|
Size: 2211
Comment:
|
Size: 2311
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 28: | Line 28: |
| Prescribed time histories movement and loading of the tibiofemoral joint (six degrees of freedom) representative of pivot shift data: * flexion * internal/external rotation torque * varus/valgus torque * anterior/posterior force * medial/lateral force * compression/distraction force |
|
| Line 31: | Line 40: |
Six degrees of freedom loading of tibiofemoral joint (prescribed flexion; internal/external rotation and varus/valgus moments; anterior/posterior, medial/lateral and compression/distraction forces): |
Synopsis
The overall goal of this case study is to provide the utility of Open Knee(s) - Generation 1 model for reproducing the outcome of a clinical test, the pivot shift, for evaluating mechanical function of the anterior cruciate ligament.
Use Case
The case is based on reproduction of a pivot shift loading scenario in a tibiofemoral joint model. The loading scenario was measured in a cadaver knee during pivot shift tests conducted by an orthopaedic surgeon. In follow-up robotics testing, this loading profile was adjusted for robotics testing of intact, ACL deficient, and ACL reconstructed knees. The use case aims for illustrating the capacity of the Open Knee(s) - Generation 1 model to reproduce the clinical differentiation of intact and ACL deficient knee in a virtual sense.
Simulation Aims
- To understand the role of ACL for stabilization of the joint during pivot shift testing (primary)
- To explore the correspondence of Open Knee(s) simulation against robotics prescribed pivot shift loading of various knees (secondary)
Model
The model is based on Open Knee(s) - Generation 1 model, which was updated for FEBio version 2.1:
Inputs
Prescribed time histories movement and loading of the tibiofemoral joint (six degrees of freedom) representative of pivot shift data:
- flexion
- internal/external rotation torque
- varus/valgus torque
- anterior/posterior force
- medial/lateral force
- compression/distraction force
Outputs
Simulation Conditions
- with intact ACL
- without the ACL (very low stiffness for convenient modeling and simulation workflow)
Team Members
Progress
Source Code Repository
https://simtk.org/svn/openknee/app/PivotShift/
Data
https://simtk.org/svn/openknee/app/PivotShift/dat/
Model Customization
https://simtk.org/svn/openknee/app/PivotShift/src/
Simulations
Post-Processing
https://simtk.org/svn/openknee/app/PivotShift/sol/
Publications
https://simtk.org/svn/openknee/app/PivotShift/doc/